Apparatus for centrifugally molding concrete blocks, slabs, and like articles



Oct. 24, 1933. R. WILLIAMS 1,931,597

PPRTUS FOR CENTRIFUGALLY HOLDING CONCRETE BLOCKS, SLABS, AND LIKE ARTICLES Filed Julyy 27, 1952 enemies n, 24, 193e c y l' f m APPARATUS FOR CENTRIFUGALLY EEOLDING CNCEETE BLOGKS, K SLABS, AND LiKE ARTHCLES Ralph Williams, Sydney, New South Wales, Australia Application July 27, 1932, Serial No. 625,072, and in the Straits Settlements February 11, 1932.

sV claims. (ol. 25-41) The object of the invention is to provide a or" the mold 13. In order that the mold 13 may be special mold used in connection with a centrifreadily opened and closed the angle strips exugal molding apparatus, said mold having means tending along one of its ends and sides may be whereby it may be easily opened and closed, means formed integrally. The two angular strips so 5 v for increasing its depths or capacities and a demade may behinged as at 46 at a corner or" the 55 tachable former and perforated core adapted to mold and detachably secured by a bolt 47 or other the production of hollow blocks or like articles. fastening at the opposite corner thereof, as shown The invention also comprehends improvements in Fig. 3. in the details of construction and arrangement A metal plate 48 is placed within the mold 13 of parts to be hereinafter described and partiow in contact withv the base 43 in order to protect the 6() larly pointed out in the claims. same from the wearing action of the concrete main the accompanying explanatory draWing:- terial and to provide a smooth surface on the Figure 1 is a side elevation of av molding apfinished blocks or slabs. The plate 48 may be paratus with which the improved mold operates. straight or curved-see Fig. S-or ornamented to Figure 2 is a sectional view oi a mold. produce corresponding impressions on the molded 65 Figure 3 is a plan view or a special hinged blocks or slabs. mold. n 1 The mold 13 may be provided with extensions Figure 4 isa section of a mold having an ex- 49 to increase their depth, if required. tension and a special former. i Core plates 50 of any required shape may be Figure 5 is a section or" a mold having a detachpositionedv in the mold 13 for the production oi 70 able cover plate and a perforated core. f hollow blocks or articles, and rholes or perfora- A boss or spider 5 is securely iixed to the shaft tions 51 may be made in the core plates to permit 4 midway between the bearings 3, and mounted on excess water to escape. The extensions 49 and and rigidly iixed to the spider 5 is a revolvahle core plates 50 may be secured in position on the frame 6 made of suitable structural steel. The mold 13 by swinging bolts 52 pivoted on the angle 75 shaft 4 passes along or is co-axial with the longistrips 45 and having nuts 53 on their free ends tudinal axis of symmetry or" the frame 6 so that adapted to be tightened upon a cover plate or said frame is symmetrically disposed about the closure 54. shaft 4, as will be evident from Fig. 1. In order that the extended mold 13 may be l'30 In Fig. 1, a cage 7 is positioned at one side of the readily opened and closed, the extensions 49 may 80- shaft 4 and is secured to a diametrically arranged vbe made in separate pieces which after assembly beam or girder 37 made of structural steel and in the mold may be secured together by a dexed rigidly to the boss or spider 5. The beam or tachable peripheral band 55. girder 37 is extended'on the opposite side of the Blocks, slabs and like articles formed and con- 35 shaft 4 and carries aradially adjustable countersondated by Centrifugal action in @ne gymnng 8.5. DOSS 01 'Dalll Weight 38- Th@ beam C1 girdel molds 13 are very strong and dense in character, 37 is graduated as at 39 to indicate positions of the and are hard and Smooth and Capable of yecev COllIlteIDOiSe 38 COTTBSDOHOUHS l0 dffelelt ing a high polish, so that they are very useful for Weights plaCed in the Cage '7- The COHDBYDOS@ 33 architectural and other constructional purposes,

i4() iS DI'OVdGd With all ndatOl 40, Whh may be and for paving road surfaces and footpaths. 90

brought into alignment with any of the gradua* AW119i; 1 d'0 claim is; tions 39 and is also provided with a bolt 41 adapt- 1, In Centrifugal molding apparatus Of JEn@ ed be Passed hIOUgh the COUHSFDOSG 33 and character described, a mold having a base board through holes 42 in the beam 37 COYTBSDODdDg t0 or plate, a rabbet formed around the base board v ',145 the various graduations. or plate, an angle strip iitting and extending 95-` The mOld as Set 011i? in Figures 1, 2, 3, 4 and 5 around the rabbet, detachable extension plates COrlSStS 0f a bBJSG bOS'DTd 0I plate 43 made 0f Sllttting within the angle strip, a peripheral band able timber or metalis provided and formed with around the extension plates, clamping bolts a I'abbet 44 aI'Oun'd its edges. The Iabbet 44 aC- pivoterdon the angle strips, a cover plate adapted :5o commodates angle strips 45 which form the Sides to be heid in pace by the clamping bolts. a core roo plate extending into the mold and secured by the cover plate, and perforations in the core plate.

2. In a centrifugal molding apparatus of the character described, a mold having a base board, a rabbet formed around the base board, a. removable metal plate adapted to rest on said base board and serve as a Wearing plate. for they mold, an angle strip fitting and extending around the rabbet, detachable extension plates tting Within the angle strip, a peripheral band around the ex 

